('09-'13) Pitrack_1's Saga: DPF regens vs performance & economy loss - Page 4 - Subaru Forester Owners Forum
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post #46 of 224 (permalink) Old 05-02-2014, 11:00 PM
dpm
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was the engine at full operating temp during your short regens? If not, there are warmup strategies that may *look* like a regen.


2015 SJ XCdiesel CVT
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post #47 of 224 (permalink) Old 05-03-2014, 05:44 AM Thread Starter
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Quote:
Originally Posted by dpm View Post
was the engine at full operating temp during your short regens? If not, there are warmup strategies that may *look* like a regen.
Yes it was warm, it was approx 10-15min drive in 20įC before this happened. And the my () DPF Regen light came on.

This vehicle's performance during warm up has always been excellent, it just takes too long to start heating the cabin and the blue lamp to go off (~5km). Cold (meaning not below ~-5įC) starting and running has always been exemplary.


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2010 Forester Diesel (for the moment)
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post #48 of 224 (permalink) Old 05-03-2014, 02:56 PM
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A little off topic, I realise, but have you guys used this:
Penrite Oil - A Better Class Of Oil

http://www.penriteoil.com.au/tech_pd...rch%202014.pdf

Does it work? Or just snake oil.
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post #49 of 224 (permalink) Old 05-04-2014, 11:56 PM
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This is what I use, Fuel Additive | Performance Additive | DIESEL POWER ECOMAX, but it is only part of the solution in minimising top end contamination and Cat/DPF problems.

See 2010 Forester, no boost!
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post #50 of 224 (permalink) Old 05-07-2014, 09:34 AM Thread Starter
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A fool and his money...

Quote:
Originally Posted by Turbo_sarah View Post
RomRaider supports J2534 pass-through interfaces, like OP2.0 is, but AFAIK only Tactrix is tested jet.
Maybe Mongoose to, but no VAG-Com CAN interface.

My VCDS-Interface needs a firmeware update to be able to support pass-through. If yours doesnīt and work, give a shoot in RomRaider forum.

We are looking for alternatives to Tactrix, witch supports J2534 pass-through..
Quote:
Originally Posted by pitrack_1 View Post
I received my new cable a few days ago. I have been able to install the drivers and get it recognised as a J2534 pass-through cable (using VAG-COM).
Well, I thought it said J2534 pass-thru... haven't been able to get it to say that today! Maybe I was seeing things, or saw what I wanted to see...having said that, I did get two differing returns from the cable today (one serial pass through, the other no interface present). So the new cable won't do J2534

In the meantime, my current interface is on the blink (otherwise I've damaged my plug/socket ). I'm asking OBDKey to confirm their device will manage SSM over CAN, if so a Bluetooth one of those should cover both EOBD and SSM (but not simultaneously) for both PC and Android.

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post #51 of 224 (permalink) Old 05-08-2014, 05:53 AM Thread Starter
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Just tonight...


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post #52 of 224 (permalink) Old 05-12-2014, 07:53 AM Thread Starter
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Ford Territory AWD TDCi Auto

Had the pleasure of driving a Ford Territory AWD TDCi Auto on Friday for work- Canberra to the Central Coast and back, a 12 hour day all up. Makes an interesting comparison to the Forester.

The good: Sophisticated suspension tuning- far more controlled than the forester on-road, good fit and finish, more space than the Forester, well designed, very well hushed engine, comfortable and relaxing on a long trip.

The bad: low-rent interior plastics, questionable fuel economy, woeful driveline response, expensive diesel and AWD options.

Quick review
Fit and finish, spacious and comfortable cabin and good road manners make this a good touring family (or work) vehicle especially on long trip. The diesel engineís so muted even standing outside the vehicle for a sub-zero start up (wash down the windows) I didnít realise it was a diesel until I was told and looked at the badge! On the highway it cruises very nicely. Even the speedo is calibrated properly (note to Subaru).

But the engine and transmission combination...and I think a Subaru DPF regen gives sluggish response! This combination is positively glacial when prodded towards action. Ford took the Discovery 3 diesel, ripped the twin turbos off and stuck a single turbo on. Coupled with a slushbox auto, between the engine trying to spool and the auto trying to decide both where itís at and where it should be, itíd be quicker to organise a public service committee and reach a decision. And the more you press the accelerator, the worse the deficit and delay becomes. I aborted at least one overtaking manoeuvre and one pull out intro traffic due to the lack of response. And I donít think the passenger knew! It may be that flicking the auto to Ďsportí (manual?) mode may help solve this delay, but that defeats the purpose of an auto. Oh, I donít think itís EURO5 either given the quantities of smoke Iíve seen out of the rears of these cars.

Questionable fuel economy (~9-10l/100km on the highway) and cheapo plastics are the other two issues. However if they could fix the drivetrain delay the car would be a winner. Fix all three issues, add EURO 5 and itíd be an absolute champion drive.

Not bad for something that first appeared in 2004.

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post #53 of 224 (permalink) Old 05-16-2014, 01:55 PM
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Nice work on the Torque displays Pitrack... I've recieved my bt OBD adaptor yesterday and had a quick play with the default software on my android phone last night... everything works :)
I've just downloaded and setup the PID's and dashboard you supplied.... going to have a play with it later and see what this car of mine is doing. Will let you know how it goes
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post #54 of 224 (permalink) Old 05-17-2014, 01:16 AM Thread Starter
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Torque Pro, BT adaptor and U0073 error

Tvilleguy,

just a heads up... I'm finding you can get a U0073 error that causes a "Christmas lights" effect, and the steering, performance and other systems may be affected.

The U0073 is a network error and can be cleared by Torque Pro.

Be careful how you start up the logging/monitoring. I'd suggest in particular you don't have Torque Pro running such that it tries to reconnect after a brief stop, without having slept/stopped your Android device and/or Torque. That is, close the lid/sleep the Android device or exit Torque before you restart the engine.

See this post (I've a few others lying around too, do a search for u0073) for a bit more info.

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post #55 of 224 (permalink) Old 05-17-2014, 06:02 AM
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Thanks for the heads up... will keep that in mind.

So I used it today... all works very well! The thing that gets me though is this...
When I first got into the car and started it, it says my oil dilution is at 6% (which would be right... it's about 8500km since it's last service)... but the soot level was only at 14%. With not a lot of driving (went to the shops twice, which involves highway run and 80km zones) and it's jumped up to about 40%. I noticed that that the soot level rose VERY quickly when cruising with the RPM's at around 2400-2600rpm (approx 1% every 10 seconds), drop that down to lower revs (1800-2000) and it was a much slower rise. This goes against EVERYTHING that I've been reading about these subie diesels... ie... keep the revs up a bit, drive them harder, etc.
The other issue is the boost level... I had that logged on the trip home and it didn't seem to get over 7lb (I probably revved it up to about 4000rpm)... I thought these engines pushed a lot more air than that?
I'll be removing the EGR valve in the morning and giving it a proper clean... will be interesting to see how mucked up it is... will also try lubing the cog that the motor drives and see if that helps with anything. I'll take some pics and put it into a post when I do it.

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post #56 of 224 (permalink) Old 05-17-2014, 09:40 AM
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I wonder how far off we from a "Force Regen" button for Torque pro

2011 Subaru 2.0 Diesel
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post #57 of 224 (permalink) Old 05-18-2014, 03:32 AM Thread Starter
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Soot and boost levels

Tvilleguy,

Quote:
Originally Posted by Tvilleguy View Post
Thanks for the heads up... will keep that in mind.

So I used it today... all works very well!
Great!

Quote:
Originally Posted by Tvilleguy View Post
The thing that gets me though is this...
... but the soot level was only at 14%. With not a lot of driving (went to the shops twice, which involves highway run and 80km zones) and it's jumped up to about 40%. I noticed that that the soot level rose VERY quickly when cruising with the RPM's at around 2400-2600rpm (approx 1% every 10 seconds), drop that down to lower revs (1800-2000) and it was a much slower rise. This goes against EVERYTHING that I've been reading about these subie diesels... ie... keep the revs up a bit, drive them harder, etc.
This tallies exactly with how my car behaves. The soot level registered seems to increase with temperature. Twice I've seen once I stop the engine during a regen at ~30% soot, a cold (next morning) restart will register 0% soot. It can then be 10-14% by the end of the street, and increase at 1% per 2 seconds thereafter up to ~30-33%.

After that, it wobbles about a bit but gradually increases to the regen levels. Usually gets stuck in the 40-60% range, cold restarts result in some reduction but not much.

An uphill run during a regen drives it down quite quickly.

I suppose at least this way it's a sort of 'failsafe', i.e. when at working temp it's more likely to trip a regen rather than have it decrease the value when hot. As it gets really hot when regenning, I suppose this encourages a full burn-off as the soot value will also reduce with the reducing temp after the regen.

Quote:
Originally Posted by Tvilleguy View Post
The other issue is the boost level... I had that logged on the trip home and it didn't seem to get over 7lb (I probably revved it up to about 4000rpm)... I thought these engines pushed a lot more air than that?
My too, exact same reading.

Quote:
Originally Posted by Tvilleguy View Post
I'll be removing the EGR valve in the morning and giving it a proper clean... will be interesting to see how mucked up it is... will also try lubing the cog that the motor drives and see if that helps with anything. I'll take some pics and put it into a post when I do it.
Hmm, given what you've written elsewhere and the boost level afterwards, I think I'll be looking at things...

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post #58 of 224 (permalink) Old 05-26-2014, 08:49 AM Thread Starter
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DPF Regen "hexadecimal century"

Just hit the DPF Regen "hexadecimal century" at 256: PID rolls over from 00FF (255) to 0100 (256).


I forgot to take an image of the 00FF reading (255) but below is an excerpt from my logging confirming the rollover.
Code:
Device Time	DPF Active Regen Switch(on/off)	DPF Active Regen Count
40:48.7		255				255
40:49.2		255				255
40:49.8		0				256
40:50.3		0				256
Wonder what happens when I get to 65536 (FFFF)? Shouldn't take too long at the rate I'm going with regens!

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post #59 of 224 (permalink) Old 05-27-2014, 07:24 AM Thread Starter
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Velcro Mounted Nexus 7 w/ Torque Pro DPF displays

Here's how I've mounted my Nexus 7 2013 with the DPF readouts over the head unit in the dash. This position gives easy readability, easy reach and an uncanny fit for the space. The velcro has been attached to the Nexus' aftermarket case lid and to the dash top.


The unit is near to the dash console power outlet but not near the aux-in in the centre cubby (the Nexus makes a great MP3 player too). With the steering wheel controls I can still listen to the radio (my main medium) with minimum inconvenience. Auto-dimming by the Nexus 7 is very good, being only somewhat dim during bright sunlight.

If you're lucky I'll make up another thread/post on how to mount this.

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post #60 of 224 (permalink) Old 05-27-2014, 10:00 PM
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Given that even a Freeway cruise (110 kph) is not enough load to burn off soot, how fast would you have to go to reduce it and avoid regens? The NT is a bit far to go for testing for me.

MY10 diesel
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